In William Gibson's Neuromancer, the mercenary Molly Millions has a lot of enhancements — including retractable razor blades beneath her fingernails. These 3D printed nails from The Laser Girls are how I imagine Molly's nails would look from the outside, when the razors are withdrawn.

Now you too can look like Molly, and have fierce, textured nails that belong on a cyborg.

Here's another model, even more razory. Just because you've weaponized your nails doesn't mean they can't be gorgeous.